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https://github.com/tornadocash/tornado-nova
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transfer!
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parent
0edd6d237c
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95
src/index.js
95
src/index.js
@ -1,3 +1,4 @@
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/* eslint-disable no-console */
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const MerkleTree = require('../lib/merkleTree')
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const MerkleTree = require('../lib/merkleTree')
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const fs = require('fs')
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const fs = require('fs')
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const { bigInt, stringifyBigInts } = require('snarkjs')
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const { bigInt, stringifyBigInts } = require('snarkjs')
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@ -25,7 +26,7 @@ const toHex = (number, length = 32) => '0x' + (number instanceof Buffer ? number
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function merklePathIndicesToBigint(indexArray) {
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function merklePathIndicesToBigint(indexArray) {
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let result = 0
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let result = 0
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for(let item of indexArray.slice().reverse()) {
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for(let item of indexArray.slice().reverse()) {
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result = (result << 1) + item
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result = (result << 1) + item
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}
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}
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return result
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return result
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}
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}
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@ -59,7 +60,7 @@ function createOutput(amount, pubkey) {
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return createUtxo(amount, rbigint(), pubkey)
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return createUtxo(amount, rbigint(), pubkey)
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}
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}
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function createInput(amount, blinding, pubkey, privkey, merklePathIndices, merklePathElements) {
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function createInput({ amount, blinding, pubkey, privkey, merklePathIndices, merklePathElements }) {
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return createUtxo(amount, blinding, pubkey, privkey, merklePathIndices, merklePathElements)
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return createUtxo(amount, blinding, pubkey, privkey, merklePathIndices, merklePathElements)
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}
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}
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@ -73,11 +74,13 @@ function createUtxo(amount, blinding, pubkey, privkey, merklePathIndices, merkle
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return utxo
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return utxo
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}
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}
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function createDeposit(amount, pubkey) {
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function createDeposit(amount, keypair) {
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const keypair = randomKeypair()
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const fakeKeypair = randomKeypair()
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const output = createOutput(amount, keypair.pubkey)
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output.privkey = keypair.privkey
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const tx = {
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const tx = {
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inputs: [createZeroUtxo(keypair), createZeroUtxo(keypair)],
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inputs: [createZeroUtxo(fakeKeypair), createZeroUtxo(fakeKeypair)],
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outputs: [createOutput(amount, pubkey), createZeroUtxo(keypair)], // todo shuffle
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outputs: [output, createZeroUtxo(fakeKeypair)], // todo shuffle
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}
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}
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return tx
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return tx
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}
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}
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@ -87,7 +90,8 @@ async function buildMerkleTree() {
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const events = await contract.getPastEvents('NewCommitment', { fromBlock: 0, toBlock: 'latest' })
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const events = await contract.getPastEvents('NewCommitment', { fromBlock: 0, toBlock: 'latest' })
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const leaves = events
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const leaves = events
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.sort((a, b) => a.returnValues.index - b.returnValues.index) // todo sort by event date
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.sort((a, b) => a.returnValues.index - b.returnValues.index) // todo sort by event date
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.map(e => e.returnValues.commitment)
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.map(e => toHex(e.returnValues.commitment))
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console.log('leaves', leaves)
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return new MerkleTree(MERKLE_TREE_HEIGHT, leaves)
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return new MerkleTree(MERKLE_TREE_HEIGHT, leaves)
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}
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}
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@ -103,7 +107,7 @@ async function deposit() {
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const tree = await buildMerkleTree()
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const tree = await buildMerkleTree()
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const oldRoot = await tree.root()
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const oldRoot = await tree.root()
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const keypair = randomKeypair()
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const keypair = randomKeypair()
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const tx = createDeposit(amount, keypair.pubkey)
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const tx = createDeposit(amount, keypair)
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await insertOutput(tree, tx.outputs[0])
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await insertOutput(tree, tx.outputs[0])
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await insertOutput(tree, tx.outputs[1])
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await insertOutput(tree, tx.outputs[1])
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console.log('Note', tx.outputs[0])
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console.log('Note', tx.outputs[0])
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@ -135,7 +139,8 @@ async function deposit() {
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outPathElements: tx.outputs[0].merklePathElements.slice(1)
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outPathElements: tx.outputs[0].merklePathElements.slice(1)
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}
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}
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console.log('input', JSON.stringify(stringifyBigInts(input)))
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// console.log('input', JSON.stringify(stringifyBigInts(input)))
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console.log('DEPOSIT input', input)
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console.log('Generating SNARK proof...')
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console.log('Generating SNARK proof...')
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const proofData = await websnarkUtils.genWitnessAndProve(groth16, input, circuit, proving_key)
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const proofData = await websnarkUtils.genWitnessAndProve(groth16, input, circuit, proving_key)
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@ -155,10 +160,77 @@ async function deposit() {
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console.log('Sending deposit transaction...')
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console.log('Sending deposit transaction...')
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const receipt = await contract.methods.transaction(proof, ...args).send({ value: amount, from: web3.eth.defaultAccount, gas: 1e6 })
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const receipt = await contract.methods.transaction(proof, ...args).send({ value: amount, from: web3.eth.defaultAccount, gas: 1e6 })
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console.log(`Receipt ${receipt.transactionHash}`)
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console.log(`Receipt ${receipt.transactionHash}`)
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return tx.outputs[0]
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}
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}
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async function transact() {
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async function transact(txOutput) {
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console.log('txOutput', txOutput)
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const tree = await buildMerkleTree()
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const oldRoot = await tree.root()
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const keypair = randomKeypair()
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const index = await tree.getIndexByElement(toHex(txOutput.commitment))
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console.log('index', index)
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const { path_elements, path_index } = await tree.path(index)
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console.log('path_index', path_index)
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txOutput.merklePathElements = path_elements
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const input1 = createInput(txOutput)
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const tx = {
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inputs: [input1, createZeroUtxo(fromPrivkey(txOutput.privkey))],
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outputs: [createOutput(txOutput.amount / 4, keypair.pubkey), createOutput(txOutput.amount * 3 / 4, txOutput.pubkey)], // todo shuffle
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}
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await insertOutput(tree, tx.outputs[0])
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await insertOutput(tree, tx.outputs[1])
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console.log('Note', tx.outputs[0])
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let input = {
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root: oldRoot,
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newRoot: await tree.root(),
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inputNullifier: [tx.inputs[0].nullifier, tx.inputs[1].nullifier],
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outputCommitment: [tx.outputs[0].commitment, tx.outputs[1].commitment],
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extAmount: 0,
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fee: 0,
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recipient: 0,
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relayer: 0,
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// private inputs
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privateKey: tx.inputs[0].privkey,
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// data for 2 transaction inputs
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inAmount: [tx.inputs[0].amount, tx.inputs[1].amount],
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inBlinding: [tx.inputs[0].blinding, tx.inputs[1].blinding],
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inPathIndices: [merklePathIndicesToBigint(tx.inputs[0].merklePathIndices), merklePathIndicesToBigint(tx.inputs[1].merklePathIndices)],
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inPathElements: [tx.inputs[0].merklePathElements, tx.inputs[1].merklePathElements],
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// data for 2 transaction outputs
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outAmount: [tx.outputs[0].amount, tx.outputs[1].amount],
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outBlinding: [tx.outputs[0].blinding, tx.outputs[1].blinding],
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outPubkey: [tx.outputs[0].pubkey, tx.outputs[1].pubkey],
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outPathIndices: merklePathIndicesToBigint(tx.outputs[0].merklePathIndices.slice(1)),
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outPathElements: tx.outputs[0].merklePathElements.slice(1)
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}
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console.log('TRANSFER input', input)
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console.log('Generating SNARK proof...')
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const proofData = await websnarkUtils.genWitnessAndProve(groth16, input, circuit, proving_key)
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const { proof } = websnarkUtils.toSolidityInput(proofData)
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const args = [
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toHex(input.root),
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toHex(input.newRoot),
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[toHex(tx.inputs[0].nullifier), toHex(tx.inputs[1].nullifier)],
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[toHex(tx.outputs[0].commitment), toHex(tx.outputs[1].commitment)],
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toHex(0),
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toHex(input.fee),
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toHex(input.recipient, 20),
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toHex(input.relayer, 20),
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]
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console.log('Sending transfer transaction...')
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const receipt = await contract.methods.transaction(proof, ...args).send({ from: web3.eth.defaultAccount, gas: 1e6 })
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console.log(`Receipt ${receipt.transactionHash}`)
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return tx.outputs[0]
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}
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}
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async function main() {
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async function main() {
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@ -171,7 +243,8 @@ async function main() {
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contract = new web3.eth.Contract(contractData.abi, contractData.networks[netId].address)
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contract = new web3.eth.Contract(contractData.abi, contractData.networks[netId].address)
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web3.eth.defaultAccount = (await web3.eth.getAccounts())[0]
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web3.eth.defaultAccount = (await web3.eth.getAccounts())[0]
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await deposit()
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const txOutput = await deposit()
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const txOutput1 = await transact(txOutput)
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}
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}
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